100Cr6 803J Steel Capillary

Ovako 100Cr6 803J Steel Capillary, Spheroidize annealing Product Information -:- For detailed product information, please contact sales. -: Ovako 100Cr6 803J Steel Capillary, Spheroidize annealing Synonyms -:- For detailed product information, please contact sales. -:

Ovako 100Cr6 803J Steel, Spheroidize annealing Product Information -:- For detailed product information, please contact sales. -: # **Ovako 100Cr6 803J Steel – Spheroidize Annealed Condition** ## **Product Overview** Ovako 100Cr6 803J is a **specialized bearing steel** supplied in the **spheroidize annealed condition**, engineered to provide **exceptional resistance to fatigue crack propagation and enhanced operational reliability** in demanding applications. The **"J"** designation represents a steel grade optimized with specific micro-alloying and processing controls aimed at improving **toughness and damage tolerance**, particularly under high-stress, cyclic loading conditions. This grade focuses on maximizing the steel's ability to withstand and arrest crack initiation and growth, making it ideal for components where unpredictable overloads or impact stresses are a concern alongside standard fatigue requirements. ## **Key Features & Benefits** * **Enhanced Toughness and Crack Propagation Resistance:** The primary advantage of the 803J grade is its **improved fracture toughness and ability to resist crack growth** compared to standard 100Cr6 grades. This is achieved through precise control of carbide morphology, grain refinement, and potentially targeted micro-alloying, resulting in a material that offers greater safety margins against catastrophic failure. * **Superior Spheroidized Microstructure:** The annealing process produces a fine, uniform dispersion of spheroidal carbides within a soft ferrite matrix. This structure not only ensures excellent machinability but also provides an optimal foundation for developing a tough, homogeneous microstructure after final heat treatment, free from stress-concentrating features. * **Good Fatigue Life with Improved Reliability:** While maintaining the good basic fatigue properties of 100Cr6, the 803J grade is designed to exhibit **more stable and predictable fatigue behavior**, especially in the presence of material imperfections or surface damage. It aims to reduce the statistical scatter in fatigue life data, enhancing design reliability. * **Balanced Performance for Demanding Conditions:** This grade is particularly suited for applications where components may experience **shock loads, variable stress amplitudes, or operate in environments where minor damage is possible**. It provides a robust material solution that can tolerate higher stress intensities without failure. * **Excellent Machinability and Heat Treatment Response:** The spheroidize annealed condition (~200 HB) offers excellent machinability for complex component manufacturing. The homogeneous structure promotes uniform hardening response with minimal distortion during subsequent heat treatment. ## **International Standards & Designations** The 803J grade represents a toughness-enhanced variant within the bearing steel family. | Region/Standard | Standard Designation | Equivalent / Similar Grade | Key Characteristic | | :--- | :--- | :--- | :--- | | **EUR (EN)** | **1.3505** (100Cr6) | Base material standard with enhanced toughness properties. | Toughness-optimized grade. | | **ISO** | **ISO 683-17: 100Cr6** | Standard for through-hardening bearing steel. | Improved toughness variant. | | **USA (AISI/ASTM)** | **52100 (Toughness Modified)** | Sometimes referred to in industry as a high-toughness 52100 variant. | | | **Ovako Designation** | **803J** | **"J" denotes optimization for improved toughness and crack propagation resistance.** | | ## **Chemical Composition (Typical - %)** The composition adheres to 100Cr6 specifications but may include subtle adjustments or tighter controls to enhance toughness. | Element | Content (%) | Role & Special Characteristic | | :--- | :--- | :--- | | **Carbon (C)** | 0.98 - 1.10 | Provides base hardness. Distribution and carbide morphology are controlled to benefit toughness. | | **Chromium (Cr)** | 1.35 - 1.60 | Standard content for hardenability and wear resistance. | | **Manganese (Mn)** | 0.25 - 0.45 | Provides hardenability. May be controlled to lower end of range to benefit toughness. | | **Silicon (Si)** | 0.15 - 0.35 | Deoxidizer and solid solution strengthener. | | **Phosphorus (P)** | **≤ 0.015** | Very low to maximize toughness and fatigue strength. | | **Sulfur (S)** | **≤ 0.008** | Low to minimize MnS inclusions that can act as crack initiators. | | **Nickel (Ni)** | May be added (~0.10-0.25%) | **Potential micro-alloying element.** Nickel is a potent toughener, improving fracture toughness and low-temperature performance without compromising hardenability. | | **Molybdenum (Mo)** | May be added (trace) | Can refine grain structure and improve hardenability/toughness balance. | | **Oxygen [O]** | < 15 ppm | Controlled low oxygen content. | | **Iron (Fe)** | Balance | | ## **Physical & Mechanical Properties (Spheroidize Annealed Condition)** * **Delivery Hardness:** **190 - 215 HB** * **Microstructure:** Uniform, fine **spheroidized carbides** in ferrite matrix. Potentially finer prior austenite grain size. * **Tensile Strength:** ~650 - 770 MPa * **Yield Strength (Rp0.2):** ~400 - 510 MPa * **Elongation (A5):** ~20 - 30% * **Toughness Indicator (Annealed):** Good ductility and reduction of area. ## **Properties After Hardening & Tempering (Indicative)** * **Final Hardness (Quenched & Tempered):** **59 - 63 HRC** * **Fracture Toughness (KIC):** **Improved** over standard 100Cr6 grades at equivalent hardness. * **Impact Toughness:** Higher Charpy V-notch values, particularly at lower temperatures. * **Fatigue Crack Growth Rate:** Reduced, indicating better resistance to crack propagation under cyclic loading. ## **Typical Applications** This spheroidize annealed material is specified for components operating under demanding conditions where toughness is critical. * **Large-Diameter Bearings for Heavy Machinery:** Slewing rings for cranes and excavators, backup roll bearings in rolling mills, where impact loads are possible. * **Bearings in Harsh Environments:** Components for mining, earth-moving, and agricultural equipment subject to shock and contamination. * **Critical Automotive Safety Components:** Bearings in steering systems, turbochargers, or other drivetrain elements where reliability is paramount. * **Components for Cold Environments:** Applications where low-temperature toughness is a requirement. * **High-Value Gearing and Shafts:** Where resistance to crack initiation from stress concentrations (e.g., keyways, fillets) is important. ## **Processing Guidelines** * **Machining:** Excellent machinability in the annealed state. Standard practices for annealed 100Cr6 apply. * **Heat Treatment (Customer Process):** Standard 100Cr6 practices are applicable. The material's enhanced hardenability (if Ni/Mo added) may allow for slightly lower austenitizing temperatures or more forgiving quenching, contributing to lower residual stress. 1. **Austenitizing:** 830-850°C. 2. **Quenching:** Oil quenching. 3. **Tempering:** Double tempering recommended. Tempering temperatures at the higher end of the range (e.g., 180-220°C) can be used to further optimize the toughness-hardness balance. ## **Summary** **Ovako 100Cr6 803J Steel in the Spheroidize Annealed condition** is a **strategically engineered material focused on damage tolerance and operational safety**. It goes beyond standard fatigue life optimization by specifically enhancing the steel's inherent toughness and resistance to crack propagation. This provides engineers with a critical tool for designing components that must withstand unpredictable loading scenarios, shock, or operate with high reliability in challenging environments. For applications where preventing catastrophic failure is as important as maximizing fatigue life, the 803J grade offers a robust and reliable material solution, adding a vital layer of safety and performance to critical mechanical systems. -:- For detailed product information, please contact sales. -: Ovako 100Cr6 803J Steel, Spheroidize annealing Specification Dimensions Size： Diameter 20-1000 mm Length <5279 mm Size:We can customized as required Standard： Per your request or drawing We can customized as required Properties（Theoretical） Chemical Composition -:- For detailed product information, please contact sales. -: Ovako 100Cr6 803J Steel, Spheroidize annealing Properties -:- For detailed product information, please contact sales. -:

Applications of Ovako 100Cr6 803J Steel Capillary, Spheroidize annealing -:- For detailed product information, please contact sales. -: Chemical Identifiers Ovako 100Cr6 803J Steel Capillary, Spheroidize annealing -:- For detailed product information, please contact sales. -:

Packing of Ovako 100Cr6 803J Steel Capillary, Spheroidize annealing -:- For detailed product information, please contact sales. -: Standard Packing: -:- For detailed product information, please contact sales. -: Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and Steel Capillary drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 1750 gallon liquid totes Special package is available on request. E FORUs’ is carefully handled to minimize damage during storage and transportation and to preserve the quality of our products in their original condition